CN1862340A - Backlight module device based on polarization light source - Google Patents
Backlight module device based on polarization light source Download PDFInfo
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- CN1862340A CN1862340A CNA2006100193777A CN200610019377A CN1862340A CN 1862340 A CN1862340 A CN 1862340A CN A2006100193777 A CNA2006100193777 A CN A2006100193777A CN 200610019377 A CN200610019377 A CN 200610019377A CN 1862340 A CN1862340 A CN 1862340A
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Abstract
The present invention relates to a backlight module device based on polarization light source. Its structure includes the following several portions: base plate, polarization light source placed on said base plate and optical film placed on said polarization light source. It can be used as backlight illumination light source in liquid crystal display.
Description
Technical field
The present invention relates to the demonstration field, particularly a kind of back light module device based on polarization light source, it is a kind of liquid crystal display backlight module device based on direct outgoing polarized light.
Background technology
Backlight module mainly provide liquid crystal panel evenly, the light source of high brightness, ultimate principle is will point or linear light sources commonly used, changes into the area source product of high brightness and homogeneous briliancy by succinct effectively optical mechanism.The linear light sources of general using cold-cathode tube (CCFL) enters light guide plate through reflex housing, and the transition lines distribution of light sources becomes uniform surface light source, does in order to improve the brightness and the homogeneity of light source through the equal light action of diffusion sheet and the light harvesting of prismatic lens again.In recent years along with the lifting of LCD manufacturing technology, under the trend of large scale and low price, backlight module need be considered light and handy quantification, slimming, low power consumption, high brightness and the market demands that reduce cost, for remaining on the competitive power of future market, exploitation is the direction of making great efforts at present with designing novel backlight module.
At present manyly do the backlight module design with traditional cold cathode-ray tube (CRT) light source, based on the backlight module of light emitting diode (LED) still in the budding stage; Traditional LCD is backlight with CCFL, and the colour gamut of covering has only about 70% of NTSC standard, adopts the LED technology can reach 105% of NTSC standard; Generally speaking, LED-backlit has plurality of advantages such as high-luminous-efficiency, wide colour gamut, power saving, life-span length, environmental protection, is the important directions of following LCD backlight development.
At present LCD realizes colored the demonstration with optical filter, and optical filter absorbs 2/3rds luminous energy and becomes more formidable thermal losses in the demonstration; In addition, the incident light of the not polarization of polaroid absorption 1/2nd also is one of key factor of optical loss.Use optical filter and polaroid to greatly reduce the light utilization ratio, have from then on two aspects only and set about, just can significantly improve the light utilization ratio of backlight, reduce the LCD energy consumption.
The main method that improves backlight module light outgoing efficient at present is to adopt the polarisation switch technology to convert the light that polaroid absorbs to available polarized light by PS, and this need increase extra optical thin film, and relevant patent is mainly grasped in Minnesota Mining and Manufacturing Company's hand.
Summary of the invention
The present invention is directed to the existing lower problem of backlight module light utilization ratio, a kind of back light module device based on polarization light source is provided, and this device is polarized light-emitting directly, is used for LCD and can saves one group of polaroid, reduce optical loss significantly, improve the brightness of display.
The present invention adopts following technical scheme:
Back light module device based on polarization light source provided by the invention, it comprises substrate, polarized light LED and optical thin film, their light path connections successively.
The present invention has adopted the light source technology of directly sending out polarized light, and the light source in the backlight module adopts polarized light source, and the light of backlight module outgoing is polarized light, therefore, compared with prior art has following major advantage:
Can be widely used in LCD, substitute present nonpolarized light backlight module.Because the backlight module of this device can directly send the required polarized light of LCD work, incident light one side at the LCD liquid crystal cell no longer needs to attach polaroid, promptly save one group of polaroid, significantly improve light outgoing efficient, the polarized light that sends of polarized light source is with 100% the liquid crystal cell that enters in theory; Need in backlight module, not increase special optical thin film to increase the utilization ratio of light yet.
Description of drawings
Fig. 1 is that the present invention adopts polarisation LED to use synoptic diagram as the backlight module of light source.
Fig. 2 is that the present invention adopts polarisation OLED to use synoptic diagram as the backlight module of light source.
Embodiment
Back light module device based on polarization light source provided by the invention has two kinds, promptly based on polarisation LED with based on the back light module device of polarisation OLED.Its light source that adopts does not need polaroid, directly the outgoing polarized light.Specific as follows:
One. based on the back light module device of polarisation LED
Its structure is as shown in Figure 1: it comprises optical thin film 3, substrate 4 and polarisation LED 5, their successively light path connect.Polarization light source is the LED of a plurality of direct outgoing polarized lights, and the quantity of LED decides according to brightness requirement and brightness uniformity, can be according to the polarisation LED of demand combinations different colours backlight to obtain the backlight of required color.Polarisation LED directly sends polarized light, and a plurality of polarisation LED are attached on the substrate, obtains uniform plane of polarization light source by optical thin film.
Two. based on the back light module device of polarisation OLED
Its structure is as shown in Figure 2: it comprises polarisation OLED 6 and optical thin film 7.Polarization light source is the organic electroluminescent LED of direct outgoing polarized light; The plane of polarization light source polarized light that polarization light source sends directly enters liquid crystal cell 2; For adjusting the shooting angle of light source, optical thin film 7 can be set above polarisation OLED 6 as required.Organic electroluminescent LED, it contains polymer electroluminescence diode PLED and micromolecule electroluminescent diode OLED.
Three. based on the application of the back light module device of polarization light source
The present invention is based on the back light module device of polarization light source, the area source polarized light of its generation is used for LCD as backlit illumination source.
The invention will be further described again below in conjunction with accompanying drawing:
Figure 1 shows that the composition frame chart that is applied to liquid crystal display based on the module backlight of polarisation LED, wherein: on substrate 4, attach a plurality of polarisation LED 5, be mainly used in and send polarized light; Above-mentioned pointolite polarized light is diffuseed to form area source by optical thin film 3, and the area source polarized light directly enters liquid crystal cell 2, and whether the twisted state of liquid crystal decision polarized light can pass through polaroid 1 in the liquid crystal cell 2, and the information that makes is shown.
Figure 2 shows that the composition frame chart that is applied to liquid crystal display based on the module backlight of polarisation OLED, wherein: the direct polarized light-emitting of polarisation OLED6, and be area source; Above-mentioned area source polarized light directly enters liquid crystal cell 2, and whether the twisted state of liquid crystal decision polarized light can pass through polaroid 1 in the liquid crystal cell 2, and the information that makes is shown.
The given data of present embodiment are only for reference, and they can be decided according to actual conditions.
Claims (4)
1. the back light module device based on polarization light source is characterized in that: comprise substrate (4); Polarizing light source (5) is arranged on this substrate; And optical thin film (3), their light path connections successively.
2. the back light module device based on polarization light source according to claim 1 is characterized in that polarizing light source (5) is the LED of a plurality of direct emerging ray polarized lights, and it is attached on the substrate (4); The pointolite polarized light that LED sends forms area source after the optical thin film diffusion, the area source polarized light directly enters liquid crystal cell (2).
3. the back light module device based on polarization light source according to claim 1, it is characterized in that polarizing light source (5) is the organic electroluminescent LED panel of direct emerging ray polarized light, it contains polymer electroluminescence diode PLED and micromolecule electroluminescent diode OLED.
4. the back light module device based on polarization light source according to claim 1 and 2 is characterized in that being used for LCD as backlit illumination source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100193777A CN1862340A (en) | 2006-06-15 | 2006-06-15 | Backlight module device based on polarization light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100193777A CN1862340A (en) | 2006-06-15 | 2006-06-15 | Backlight module device based on polarization light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1862340A true CN1862340A (en) | 2006-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100193777A Pending CN1862340A (en) | 2006-06-15 | 2006-06-15 | Backlight module device based on polarization light source |
Country Status (1)
| Country | Link |
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| CN (1) | CN1862340A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8432353B2 (en) | 2008-04-03 | 2013-04-30 | Panasonic Corporation | Information display device |
| WO2017156845A1 (en) * | 2016-03-15 | 2017-09-21 | 深圳市华星光电技术有限公司 | Liquid crystal display device and compensation circuit of organic light-emitting diode thereof |
| CN112510134A (en) * | 2020-11-30 | 2021-03-16 | 中南大学 | LED indirectly modulating light polarization mode |
-
2006
- 2006-06-15 CN CNA2006100193777A patent/CN1862340A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8432353B2 (en) | 2008-04-03 | 2013-04-30 | Panasonic Corporation | Information display device |
| WO2017156845A1 (en) * | 2016-03-15 | 2017-09-21 | 深圳市华星光电技术有限公司 | Liquid crystal display device and compensation circuit of organic light-emitting diode thereof |
| US10037736B2 (en) | 2016-03-15 | 2018-07-31 | Shenzhen China Star Optoelectronics Technology Co., Ltd | Liquid crystal devices (LCDs) and the organic light emitting diodes (OLEDs ) compensation circuits thereof |
| CN112510134A (en) * | 2020-11-30 | 2021-03-16 | 中南大学 | LED indirectly modulating light polarization mode |
| CN112510134B (en) * | 2020-11-30 | 2022-03-18 | 中南大学 | LED indirectly modulating light polarization mode |
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